Observation 168176: Panaeolus sect. Laevispora Gerhardt
When: 2014-05-29
No herbarium specimen

Proposed Names

84% (3)
Eye3
Based on microscopic features
30% (2)
Recognized by sight
Used references
Based on microscopic features

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Eye3 = Observer’s choice
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Comments

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Byrain
By: Rocky Houghtby
2014-08-24 00:11:12 CDT (-0400)

Here is additional info you asked for.

12.14 X 7.17
12.39 X 6.33
11.68 X 7.29
11.00 X 6.82
12.41 X 7.34
11.49 X 7.29
11.86 X 6.96
11.81 X 7.42
11.87 X 6.80

(11.00)12.41 X 7.42(6.33)
Avg=11. 85 X 7.04
Q= 1.68

This is the lone Cheilocystidia I was able to photograph.

Wow!
By: Mary Smiley (ladyflyfsh)
2014-08-23 12:26:36 CDT (-0400)

Thanks for all the info Rocky and Byrain. Byrain, it wouldn’t be the first time I found mushrooms that were found in Australia here in Sarasota, FL. I found Agaricus rotalis (endoxanthus) here as well and it is known to be found in Australia.

Spores
By: Byrain
2014-08-23 11:20:14 CDT (-0400)

Yes it is, its difficult to make use of just a range or just an average. An average should be of no less than 20 spores per specimen. That is a shame about the cheilocystidia, I would keep trying, it could be important in this case. If the cheilocystidia are not encrusted (Perhaps only some of them will be? As shown in Gerhardt’s illustrations) and there are 2-spored basidia, this might be something new. P. bernicis is an Australian species though, might be strange to see it in FL. Ola’h lists rather small spores for P. microsporus “7.5-8.5 X 5.0-5.5 μ”, I don’t know much more beyond that…

http://www.mushroomexpert.com/olah_panaeolus_key.pdf

Edit: Also, while you are at it, please start including a Q average and range too. You never know when it might be helpful, see the Q average for obs 77968, obs 115140, & obs 64612 compared to obs 121615 for example.

Byrain
By: Rocky Houghtby
2014-08-23 11:10:36 CDT (-0400)

The Cheilocystidia would not rehydrate/inflate well regardless of which mountant I used, they were the cylindric capitate type and they were not incrusted. What I meant is that the average was derived from ten spores. I will include a range later, if it is actually important to you.

Rocky
By: Byrain
2014-08-23 10:54:45 CDT (-0400)

What does the cheilocystidia look like? What do you mean the spores are 11.85 × 7.04, but have an average of 10? Please from now on always include both the spore range and average, not one or the other, thanks. This does not appear to be P. lentisporus because that is not supposed to have sulphidia. Using Gerhardt’s key it seems to be P. bernicis or P. microsporus. I only have the description for the former and refuse to say anymore with out more detailed chelocystidia & spore info…

“3 Spores hardly longer than 10 μm; cheilocystidia
without crystals; basidia 4-spored; terricole
……………………………… Panaeolus microsporus (25)
- Spores about 10-15 μm long; cheilocystidia with
crystals (fig. 3 g); basidia 2- to 4-spored; lignicole
……………………………………
Panaeolus bernicis (20)
(Terricole and spores in electron microscope ornamented:
see P. africanus, sect. Verrucispora.)”

Update
By: Rocky Houghtby
2014-08-22 23:33:40 CDT (-0400)

Ok, this is in Laevispora, the only part of Gerhardt’s monograph that no one has. I can’t go any further without the literature. I have my reservations that this is decomposing wood, rather the mycelium has probably anchored itself to the structure nearest open air; I have observed this myself with Panaeolus cinctulus in a cased garden bed.
This species has abundant “sulphidia” that turn brown in sulfovanillin; other cells, including hyphae and basidia turn violet in a sulfovanillin mount. The “sulphidia” posses a range of shapes that gives one the impression of a collapsed or desiccated cell.
One and two spored basidia occur frequently and posses quite a different habit from those that have four sterigma, some may be seen in the photos below.
The spores are 11.85 X 7.04 (average of 10) and interspersed with “oddballs”, spores produced on two sterigma basidia that are more or less twenty percent larger and have a more compressed, bladder like shape. All of the spores are rather flattened and all posses an apical germ pore.

If anybody has the literature, try comparing P. bernicis and P. lentisporus.

Spores, 40X, NH4OH

Spores, 100X, NH4OH

Sulphidia, Sulfovanillin mount

Panaeolus fimicola
By: Byrain
2014-06-23 14:20:53 CDT (-0400)

is not one of the lignicolous species.

To follow/subscribe
By: TimmiT
2014-06-23 11:15:28 CDT (-0400)

Click on the pair of eyes in the top right corner of the page.

I’m not sure
By: Byrain
2014-06-23 10:55:04 CDT (-0400)

how to subscribe to an observation without replying… Now hopefully I will see an e-mail when Rocky posts more micro! :D

More info
By: Mary Smiley (ladyflyfsh)
2014-06-23 07:57:44 CDT (-0400)

The specimens were found in my yard in Sarasota, but were dried and sent to Rocky for further testing and ID.

Spores
By: Rocky Houghtby
2014-06-22 22:08:10 CDT (-0400)

400X_H₂SO₄_NIC

400X_H₂SO₄

I will update this observation when I get a chance to work on this further.

Created: 2014-06-22 21:12:45 CDT (-0400)
Last modified: 2014-08-23 13:26:20 CDT (-0400)
Viewed: 175 times, last viewed: 2016-10-22 00:41:21 CDT (-0400)
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